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The Pennsylvania city announced in August it will become a dark sky city starting in 2022, meaning that it will switch to lower wattage LED bulbs and add shades along bridges, roads and other public areas. It’s the first city in the eastern part of the U.S. to adopt such policies but it joins other cities, including Tucson, Sedona and Flagstaff in Arizona, and Fulda in Germany, in their efforts to reduce light pollution and increase energy efficiency. — Bloomberg CityLab
The dark-sky movement officially began in 1988, has produced events such as Earth Hour, and is currently expanding into other U.S. cities such as Washington, D.C. and Philadelphia. Light pollution caused by stronger “white” LED fixtures has been shown to cause health and... View full entry
An estimated 600 million birds are killed by buildings every year. Especially during spring and fall migrations, birds are attracted to the glow of residential homes and skyscrapers alike. Sometimes the birds crash directly into their windows. Other times, it seems to throw off their internal compass, causing them to circle until exhausted. — Fast Company
The saddening statistic comes from a 2014 study led by Scott Loss, an assistant professor of global change ecology and management at Oklahoma State University. More recently, a new study from the Cornell Lab of Ornithology found that Chicago, Houston, and Dallas are the top three U.S. cities... View full entry
It might sound like a plot cooked up by a cartoon villain, but a city in southwestern China is aiming to launch into space an artificial moon that could replace streetlights by bathing the ground in a “dusk-like glow.”
[...] the satellite’s mirror-like exterior would reflect sunlight down to Earth, creating a glow about eight times brighter than the moon. The artificial moon, which he said would orbit about 500 kilometers above Earth, could save $174 million in electricity from streetlights.
— NBC News
The capital of China's Sichuan province, Chengdu, could have its own illumination satellite 'moon' up in the skies by 2020, according to the People's Daily. Light pollution, and its documented health effects on humans and nocturnal wildlife, doesn't seem to be much of a concern to the officials... View full entry
New York’s nightscape is as iconic [...] as it is taken for granted. A city without streetlights is impossible to imagine, but New York’s 396,572 street-side luminaires are as unremarkable as the streets’ paving — invisible until something changes. An initiative to replace sodium and halogen bulbs with energy- and cost-efficient LEDs has thrown the nightscape suddenly into question, as some city residents bemoan the loss of romance (and sleep). — Urban Omnibus
In her piece for Urban Omnibus, landscape and urban designer Emily Schlickman takes a fascinating closer look at the history of New York City's system of street-side luminaires (the largest in the nation), and how the recent transition to LED technology is affecting the city and its... View full entry
The American Medical Association (AMA) has just adopted an official policy statement about street lighting: cool it and dim it.
The statement, adopted unanimously at the AMA's annual meeting in Chicago on June 14, comes in response to the rise of new LED street lighting sweeping the country. An AMA committee issued guidelines on how communities can choose LED streetlights to "minimize potential harmful human health and environmental effects."
— CNN
There are two basic issues at hand. First, new, "white" LED lighting, which have a color temperature of between 4000K and 5000K, can cause discomfort and glare. This is because the light is concentrate and has high blue content, which can cause severe glare and force pupillary constriction... View full entry
